Issue #142 P0: テンプレ（Issue/PR）+ docs品質ゲートを追加 #1

	name: Docs Quality Gate

	on:
	pull_request:
	paths:
	- "docs/**"
	- ".github/**"
	- "scripts/**"
	- "package.json"
	push:
	branches: [main]
	paths:
	- "docs/**"
	- ".github/**"
	- "scripts/**"
	- "package.json"
	workflow_dispatch: {}

	jobs:
	docs-quality-gate:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Setup Node.js
	uses: actions/setup-node@v4
	with:
	node-version: "20"

	- name: Install dependencies
	run: npm ci --no-fund --no-audit

	- name: Collect changed Markdown files (docs/)
	id: changes
	shell: bash
	run: \|
	set -euo pipefail

	if [ "${GITHUB_EVENT_NAME}" = "pull_request" ]; then
	base="${{ github.event.pull_request.base.sha }}"
	head="${{ github.event.pull_request.head.sha }}"
	else
	base="${{ github.event.before }}"
	head="${GITHUB_SHA}"
	fi

	git diff --name-only "$base" "$head" -- docs \| grep -E '\.md$' > changed-docs-md.txt \|\| true

	echo "Changed docs markdown files:"
	if [ -s changed-docs-md.txt ]; then
	cat changed-docs-md.txt
	else
	echo "(none)"
	fi

	- name: Markdown lint (changed only)
	shell: bash
	run: \|
	set -euo pipefail
	if [ ! -s changed-docs-md.txt ]; then
	echo "Skip: no docs markdown changes."
	exit 0
	fi
	cat changed-docs-md.txt \| xargs -r npx markdownlint

	- name: Internal link check (changed only)
	shell: bash
	run: \|
	set -euo pipefail
	if [ ! -s changed-docs-md.txt ]; then
	echo "Skip: no docs markdown changes."
	exit 0
	fi
	cat changed-docs-md.txt \| xargs -r python3 scripts/check_markdown_internal_links.py

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